/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendDocumentModifyDelegates.h
struct FNodeModifyDelegates
FOnMetaSoundFro...
OnNodeAdded
FOnMetaSoundFro...
OnNodeInputLiteralSet
FOnMetaSoundFro...
OnRemoveSwappingNode
FOnMetaSoundFro...
OnRemovingNodeInputLiteral